|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||280/8 ; 280/431 ; 280/4724 ; 280/655|
|발명자 / 주소|
|인용정보||피인용 횟수 : 13 인용 특허 : 4|
Manually operated collapsible hand truck for carrying supplies to and from and across beach has wheels independently mounted on raised front tips of skis. Skis are rigidly attached to base of hand cart. Nominally upright frame is pivotably connected to front of cart base. Hand cart frame is locked into position relative to the base by moveable locking pin and entire hand cart may be tilted for rolling across hard pavement. Hand cart frame is temporarily unlocked from base for sliding transport of hand cart upon skis across soft sand.
A manually operated hand cart comprising: two or more skis; each of said skis having a nominally smooth underside; the rear end of said underside of said ski being in a first plane; and the front end of said underside of said ski being at an acute angle to said first plane; one or more wheels; each of said wheels being rotatably mounted onto said front end of said skis; a base structure rigidly attached to the top of said skis; said base structure having a front end and a rear end corresponding to said front end and said rear end of said skis, respective...